> How do you test a knock sensor ('86 5ktq)?
> the ecu claims that it is bad. Light goes on anytime the manifold pressure is abobe 1.0 bar below 3k rpm, above that speed it comes on at lower manifold pressures; no knock is present. It all started, perhaps coincidentaly, when the cat got gutted.
My car did EXACTLY this, including lighting up the "check engine" light.
It turned out to be the air intake temperature sensor gone open... I
found out by reading out the fault codes. Can you do this on an '86?